Patent GB-751354-A (GB)
Title: Improvements in or relating to mouldable metallic compositions for use in making repairs
Inventor: HOLT DOUGLAS
IPC: C09D5/34
Filed: 1953-05-05
Abstract: A mouldable metallic composition consists of at least 45 per cent by weight of aluminium powder or dust admixe width an inert filler and an acid acceptor all bonded together by a synthetic organic resin or halogenated organic elastomer and a plasticizer dispersed in a solvent or a mixture of solvents to form a composition which is initially viscous but which hardens in the air after application to a metal or other surface.  The acid acceptor is defined as a base capable of immediately neutralizing any acid which may be formed in the composition during manufacture or storage.  Calcium oxide, zinc oxide, or an organic amine may be used as acid acceptor.  As synthetic organic resin there may be used polystyrene, maleic resins, i.e. resins containing a maleic anhydride group, polymers of vinyl acetate, or copolymers of vinyl acetate and vinyl chloride.  The composition may be used as a filling composition for metal and other surfaces.  It gives coatings which are resistant to shock, heat, weather, and organic liquids such as gasoline.  The solvent may be acetone, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, isopropyl alcohol, methylene chloride, or ethylene dichloride.  The plasticizer may be a chlorinated biphenyl, ethyl abietate, or other plasticizing resin, or it may be tricresyl phosphate, sextol phthalate, triphenyl phosphate, camphor, or castor oil.  In an example, a composition comprising aluminium dust, air-floated silica, zinc oxide, calcium oxide, polyvinyl acetate, cellulose nitrate, chlorinated terphenyl, dibutyl phthalate, methyl ethyl ketone, and methylene chloride, is prepared.  In another example, a composition comprising a copolymer of vinyl chloride and vinyl acetate, a copolymer of maleic anhydride, vinyl chloride and vinyl acetate, chlorinated bi-phenyl, chlorinated ter-phenyl, methylene chloride, aluminium powder, air-floated silica, diatomaceous earth, and calcium oxide, is prepared.  Precipitated calcium carbonate may be included in the composition in addition to or instead of the silica.  The composition may contain just sufficient volatile solvent to enable it to be extruded from the nozzle of a tube in which it is packed, or it may be of suitable viscosity to be applied by a knife.  When the composition has been applied and dried it may be filed, sanded, and painted.  If desired the composition may be applied over a reinforcement of fabric, particularly when it is desired to coat a metal surface which has rusted to leave holes which have to be bridged.  The fabric sheeting used as reinforcement may be a cloth impregnated with a synthetic resin or halogenated organic elastomer similar to that used in the metallic composition.  The cloth is immersed in a solvent for the resin so that it becomes tacky, and when laid over a hole in the surface and allowed to harden, it gives a firm adhesion to the metal.  The metallic plastic composition is then applied over the sheeting.ALSO:A mouldable metallic composition consists of at least 45 per cent by weight of aluminium powder or dust admixed with an inert filler and an acid acceptor all bonded together by a synthetic organic resin or halogenated organic elastomer and a plasticizer dispersed in a solvent or a mixture of solvents to form a composition which is initially viscous but which hardens in the air after application to a metal or other surface. The acid acceptor is defined as a base capable of immediately neutralizing any acid which may be formed in the composition during manufacture or storage.  Calcium oxide, zinc oxide, or an organic amine may be used as acid acceptor.  As the synthetic organic resin or halogenated elastomer there may be used chlorinated rubber.  The composition may be used as a filling composition for metal and other surfaces.  It gives coatings which are resistant to shock, heat, weather, and organic liquids such as gasoline. The solvent may be acetone, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, isopropyl alcohol, methylene chloride, or ethylene dichloride.  The plasticize may be a chlorinated biphenyl, ethyl abietate, or other plasticizing resin, or it may be tricresyl phosphate, sextol phthalate, triphenyl phosphate, camphor, or castor oil.  Precipitated calcium carbonate may be included in the composition.  The composition may contain just sufficient volatile solvent to enable it to be extruded from the nozzle of a tube in which it is packed, or it may be of suitable viscosity to be applied by a knife.  When the composition has been applied and dried it may be filed, sanded, and painted.  If desired, the composition may be applied over a reinforcement of fabric, particularly when it is desired to coat a metal surface which has rusted to leave holes which have to be bridged.  The fabric sheeting used as reinforcement may be a cloth impregnated with a synthetic resin or halogenated organic elastomer similar to that used in the metallic composition.  The cloth is immersed in a solvent for the resin so that it becomes tacky, and when laid over a hole in the surface and allowed to harden, it gives a firm adhesion to the metal.  The metallic plastic composition is then applied over the sheeting.ALSO:A mouldable metallic composition consists of at least 45 per cent by weight of aluminium powder or dust admixed with an inert filler and an acid acceptor all bonded together by a halogenated organic elastomer, such as chlorinated rubber, and a plasticizer dispersed in a solvent or a mixture of solvents to form a composition which is initially viscous but which hardens in the air after application to a metal or other surface. The acid acceptor is defined as a base capable of immediately neutralizing any acid which may be formed in the composition during manufacture or storage.  Calcium oxide, zinc oxide, or an organic amine may be used as acid acceptor.  The composition may be used as a filling composition for metal and other surfaces. It gives coatings which are resistant to shock, heat, weather, and organic liquids such as gasoline.  The solvent may be acetone, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, isopropyl alcohol, methylene chloride, or ethylene dichloride. The plasticizer may be a chlorinated biphenyl, ethyl abietate, or other plasticizing resin, or it may be tricresyl phosphate, sextol phthalate, triphenyl phosphate, camphor, or castor oil. Precipiated calcium carbonate or air-floated silica may be included in the composition.  The composition may contain just sufficient volatile solvent to enable it to be extruded from the nozzle of a tube in which it is packed, or it may be of suitable viscosity to be applied by a knife.